Depending on what database you're using, you may find that the terms women and globalization are sufficient without the phrase developing countries. This is especially likely when searching for a book. There may be a book about women and globalization that has a chapter on developing countries, but the whole book is not on that particular aspect.

You should have at least two concepts for your research topic, only one will be too broad, making it difficult to research and to write about.

When searching in an article database, the more specific search terms are usually more successful, and you would probably use all three concepts.

MEDLINE with Full Text provides access to the US National Library of Medicine's bibliographic database and offers the full text for more than 1,370 of those journals indexed.
Subject: Medicine, nursing, dentistry, veterinary medicine, the health care system, pre-clinical sciences and much more.

This database contains DSM-5: Diagnostic and Statistical Manual of Mental Disorders; journals such as American Journal of Psychiatry, Psychiatric Services and Psychiatric News; a number of psychiatric ebooks; and the American Psychiatric Association Practice Guidelines
Subject: Psychiatry, Criminology, Nursing, Education, Psychology and more.